package main

import "fmt"

func ping(pings  chan<- string, msg string) {
    pings <- msg
}

func pong(pings  <-chan string, pongs chan<- string) {
   msg := <-pings
   pongs <-msg
}

func main() {
    pings := make(chan string, 1)
    pongs := make(chan string, 1)
  
    ping(pings, "passed message")
    pong(pings, pongs)
    
    fmt.Println(<-pongs)

}
